Optimization of top gas recycling conditions under high oxygen enrichment in the blast furnace

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Hannu Helle, Mikko Helle, Henrik Saxén, Frank Pettersson
Publisher: IRON STEEL INST JAPAN KEIDANREN KAIKAN
Publication year: 2010
Journal: Isij International
Journal acronym: ISIJ INT
Volume number: 50
Issue number: 7
Start page: 931
End page: 938
Number of pages: 8
ISSN: 0915-1559
eISSN: 1347-5460


Abstract

Primary steelmaking is among the most energy intensive industrial processes in the world and being mainly coal-based it substantially contributes to the global fossil CO(2) emissions. It is therefore important to study potential ways of suppressing the use of fossil reductants and the rate of emissions in the process. This paper analyzes by simulation and optimization the concept of recycling CO(2)-stripped top gas in the blast furnace under massive oxygen enrichment, and its impact on the production economy and emissions of the steel plant. The effect of CO(2) emissions and stripping/storage costs on the optimal states is presented. The system studied is demonstrated to exhibit complex transitions between the optimal states. The findings throw light on the importance of selecting a proper state of operation for achieving a cost-efficient production of steel with reduced environmental impact.


Keywords

blast furnace, CO(2) emissions, economic optimization, top gas recycling

Last updated on 2019-17-10 at 04:14